He used a rope to mark off the circle.

他用一根绳子把这个圈围了起来。

《柯林斯英汉双解大词典》

I have several lots of essays to mark this weekend.

这周末我有几批文章要批改。

《牛津词典》

They scratched lines in the dirt to mark out a pitch.

他们在地上划出一个球场。

《牛津词典》

This past week,volunteers from Red Cross and Red Crescent societies around the world gathered in Solferino to mark the anniversary.

VOA: special.2009.07.01

One way to mark time is to imagine it carries a clock as it moves, and put markers every second.

标记时间的一种方法是,想像它带着时钟运动,并且每秒做一次标记

耶鲁公开课 - 基础物理课程节选

The first step is divide them in half. All right? I'm not sure how to mark it here, remember I need to come back there. I'm not yet done. What do I do?

我不能确定如何,在这里进行标记,记住我会回这里进行讲解,我还没做完呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

The solstice is a historically pagan celebration to mark the longest and shortest days of the year.

UNESCO: UK National Commission for UNESCO - Longest crowds for the longest day, as Stonehenge solstice visitors reach 23,000

Any radical regulatory surgery would also require governments to mark out some very artificial boundaries.

ECONOMIST: The contract between society and banks will get stricter

After the unlawful detention ruling last summer, the council apologised to Mark and Steven Neary.

BBC: Hillingdon Council to pay Steven Neary ?35,000